1 /* ====================================================================

     2  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  *

     8  * 1. Redistributions of source code must retain the above copyright

     9  *    notice, this list of conditions and the following disclaimer. 

    10  *

    11  * 2. Redistributions in binary form must reproduce the above copyright

    12  *    notice, this list of conditions and the following disclaimer in

    13  *    the documentation and/or other materials provided with the

    14  *    distribution.

    15  *

    16  * 3. All advertising materials mentioning features or use of this

    17  *    software must display the following acknowledgment:

    18  *    "This product includes software developed by the OpenSSL Project

    19  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

    20  *

    21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

    22  *    endorse or promote products derived from this software without

    23  *    prior written permission. For written permission, please contact

    24  *    licensing@OpenSSL.org.

    25  *

    26  * 5. Products derived from this software may not be called "OpenSSL"

    27  *    nor may "OpenSSL" appear in their names without prior written

    28  *    permission of the OpenSSL Project.

    29  *

    30  * 6. Redistributions of any form whatsoever must retain the following

    31  *    acknowledgment:

    32  *    "This product includes software developed by the OpenSSL Project

    33  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

    34  *

    35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

    36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

    39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

    41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

    44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

    46  * OF THE POSSIBILITY OF SUCH DAMAGE.

    47  * ====================================================================

    48  *

    49  * This product includes cryptographic software written by Eric Young

    50  * (eay@cryptsoft.com).  This product includes software written by Tim

    51  * Hudson (tjh@cryptsoft.com).

    52  *

    53  */

    54 /*

    55  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

    56  */

    57 #include "eng_int.h"

    58 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

    59 #include "libcrypto_wsd_macros.h"

    60 #include "libcrypto_wsd.h"

    61 #endif

    62 

    63 /* If this symbol is defined then ENGINE_get_default_DH(), the function that is

    64  * used by DH to hook in implementation code and cache defaults (etc), will

    65  * display brief debugging summaries to stderr with the 'nid'. */

    66 /* #define ENGINE_DH_DEBUG */

    67 #ifndef EMULATOR

    68 static ENGINE_TABLE *dh_table = NULL;

    69 #else

    70 GET_STATIC_VAR_FROM_TLS(dh_table,tb_dh,ENGINE_TABLE *)

    71 #define dh_table (*GET_WSD_VAR_NAME(dh_table,tb_dh, s)())

    72 #endif

    73 static const int dummy_nid = 1;

    74 

    75 EXPORT_C void ENGINE_unregister_DH(ENGINE *e)

    76 	{

    77 	engine_table_unregister(&dh_table, e);

    78 	}

    79 

    80 static void engine_unregister_all_DH(void)

    81 	{

    82 	engine_table_cleanup(&dh_table);

    83 	}

    84 

    85 

    86 EXPORT_C int ENGINE_register_DH(ENGINE *e)

    87 	{

    88 	if(e->dh_meth)

    89 		return engine_table_register(&dh_table,

    90 				engine_unregister_all_DH, e, &dummy_nid, 1, 0);

    91 	return 1;

    92 	}

    93 

    94 

    95 EXPORT_C void ENGINE_register_all_DH()

    96 	{

    97 	ENGINE *e;

    98 

    99 	for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))

   100 		ENGINE_register_DH(e);

   101 	}

   102 

   103 

   104 EXPORT_C int ENGINE_set_default_DH(ENGINE *e)

   105 	{

   106 	if(e->dh_meth)

   107 		return engine_table_register(&dh_table,

   108 				engine_unregister_all_DH, e, &dummy_nid, 1, 1);

   109 	return 1;

   110 	}

   111 

   112 /* Exposed API function to get a functional reference from the implementation

   113  * table (ie. try to get a functional reference from the tabled structural

   114  * references). */

   115 EXPORT_C ENGINE *ENGINE_get_default_DH(void)

   116 	{

   117 	return engine_table_select(&dh_table, dummy_nid);

   118 	}

   119 

   120 /* Obtains an DH implementation from an ENGINE functional reference */

   121 

   122 EXPORT_C const DH_METHOD *ENGINE_get_DH(const ENGINE *e)

   123 	{

   124 	return e->dh_meth;

   125 	}

   126 

   127 /* Sets an DH implementation in an ENGINE structure */

   128 

   129 EXPORT_C int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)

   130 	{

   131 	e->dh_meth = dh_meth;

   132 	return 1;

   133 	}